Lubricant-dispensing device



Filed Oct. l, 1924 fg, A' il. KCD

Patented Junelll, 1929.

UNITED l l1,716,485 Arr-:NT OFFICE.

ERNEST W. DAVIS, OF OAK PARK, ILLINOIS, ASSIGNOR TO ALEMITE MANUFACTUR- ING COEPORATION, 0F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

LUBRICANT-DISPENSING DEVICE.

Application led October 1, 1924. Serial No. 740,988.

My invention relates to improvements in lubricant dispensing devices, and is particularly concerned with the provision of a novel type of dispensing device for filling lubricant compressors, grease guns, grease cups, etc.

The objects of my present invention are First. To provide a lubricant dispensing device capable of holding a comparatively large quantity of lubricant, and embodying means whereby the lubricant can be transferred to other dispensing devices of smaller capacity. l

. Second. To provide a dispensing device, by means of which grease guns, grease cups, etc., can be easily and quickly filled, and l Third. To provide a dispensing device suchas described, that is simple in construction and economical to manufacture.

Other objects of my invention will appear as this description progresses, reference being had to the accompanying drawings disclosing one embodiment of my invention in central longitudinal section.

Referring to the drawing, my improved dispensing device comprises a container or receptacle, 5, for holding a comparatively large quantity of lubricant. The receptacle 5 is provided with a bottom wall 6, that is elevated somewhat above the lower edge of the receptacle. A cylinder 7, extends through the bottom wall 6, and is supported by the bottom wall through the instrumentality of two nuts 8 and 9, that are threaded upon the upper end .of the cylinder 7, and between which are clamped the bottom wall 6 and the two annular reinforcing disks 10 and 11.

p The lower end of the cylinder 7 is closed by 'means of the cap 12, and is supported and the strut-rods 13, that pass through the walls of the receptacle 5, and are threaded into transverse openings 14 in the cap 12.

The upper end of the cylinder 6 is provided with a plurality f inlet ports 15, that establish communication between the receptacle 5 and the cylinder.

A hollow plunger comprising a tubular terminal portion 16, and pipe sections 16 and 16", that are connected by the union 17, is reciprocably mounted'inthe cylinder7 and extends outwardly through the removable cover 18, and the bushing 19. An annular valve seat 20, is threadedl into the lower end of the tubular member 16 for co-acting with the valve 21. This valve is yieldingly held against its seat by means of the compression spring 22, one end of which contacts with the valve .21, and the other end of which contacts wlth the lowerend of the pipe section 16.

A reducing union 22 is threaded onto the upper end of the pipe section 16', and receives one end of the threaded nipple 23. A sleeve 24 is threaded onto the opposite end of the nipple 23. The bore of this sleeve is reduced throughout a portion of its length, thereby vproducing a shoulder 25, that acts as a stop for the cup-leather 26. A spring 27 in the upper end of the nipple 23 yieldinglyv urges the cup-leather in an outward direction. I provide the cup-leather 26 to make sealed contact with the fitting 28, carried by one end of the lubricant compressor29, only a portion of which is disclosed.

A tube 30 surrounds the plunger just described in spaced relation thereto, and a helical compression spring 31 is confined between the tube 30 and the plunger. One end of this compression spring abuts against the upper end of the cylinder 7, and the other end contacts with the union 17. The bushing 19 is threaded into the upper end of the tube 30.

A piston comprising the two disks 32 and 33, the inner edges of which are clamped between the bushing 34 and the collar 35, threaded on the bushing 34, is slidably mounted' upon the tube 30. The outer edges of the disks 32 and 33 have upwardly turned fianges 36 and 37, respectively between which is vclamped an annular strip of leather 38 that forms means for sealing the contact between the piston and the walls of the receptacle 5. The handle 39, by

held against lateral movement by means of which the piston can be withdrawn from the receptacle 5,-is secured to the piston by means of screws 40. For the purpose of breaking the vacuum in th'e receptacle 5, that would be formed between the bottom wall 6 and the piston just described, when an attempt is made to withdraw the piston, I prefer to provide some sort of vent valve 41, that can be opened when the piston is to be withdrawn so as to permit air to enter the space between the piston and the bottom wall 6. This vent valve may be of conventional construction, and it is therefore thought to 4be'unnecessary to describe the details ofconstruction thereof.

Assuming the parts to be in the position shown in the drawing, and assuming that the cylinder 7 and the plunger are full of lubricant,

as they will be after several operations of the device, if the operator desires to ill the compressor 29, he places it in the position shown in the drawing and then pushes downwardly upon the compressor, thereby moving the plunger downwardly into the cylinder` 7. As the plunger moves downwardly, its initial movement will close the ports 15, thereby preventing the return of lubricant from the cylinder 7, to the receptacle 5. Further movement of the plunger causes the lubricant to be displaced from the cylinder 7, through the valve seat 20, and up through the hollow plunger, and into the compressor. When the operator releases the downward pressure upon the compressor 29, the spring 31 will cause the plunger to move upwardly out of the cylinder 7. The initial portion of the upward movement causes the valve 21 to close so that the lubricant cannot return to the cylinder 7, from the hollow plunger. However, as the plungermoves upwardly, a vacuum is produced, and as soon as the ports 15 are uncovered by the upward move of the plunger, atmospheric pressure exerted upon the outer face of the piston will cause it to move downwardly, thereby displacing the lubricantfrom the receptacle 5, to the cylinder 7. By repeating the operation described above, the operator can force as much lubricant as desired into the compressor or receptacle 29.

While I have described the details of vconstruction of the preferred embodiment of my invention, it is to be clearly understood that my invention is not limited to these details of construction, but is capable of other adaptations and modifications within the scope of the appended claims.

Having thus described my invention, what I claim is: l

1. Means for filling a lubricating device, comprising a receptacle having a bottom, a cylinder extending through and supported 'by said bottom, strut-rods below said bottom, connecting said cylinder and the walls of said receptacle, said cylinder having an inlet port above said bottom, a hollow plunger having its inner end reciprocable in said cyl-v inder, and its outer end projecting out of said receptacle, an outwardly opening check valve in said plunger, a tube surrounding said plunger in spaced'relation thereto, a compression spring between said plunger and said tube, for urgin said plunger outwardly, and a piston slidably mounted on said tube.

2. Means for filling a lubricating device comprising a receptacle having a bottom, a

cylinder communicating with said receptacle and extending through and supported by i an outwardly opening check valve in said plunger, a tube surrounding said plunger in spaced relation thereto, a compression spring between said plunger and said tube for urging said plunger outwardly, and a piston slidably mounted on said tube.

3. Means for filling a lubricating device, comprising a-receptacle having a bottom, a cylinder communicating with said receptacle and extending through said bottom, a hollow plunger having its inner end reciprocable in said cylinder and its outer end projecting out of said receptacle, an outwardly opening check valve in said plunger, a tube surrounding said plunger in spaced relation thereto, a compression spring between said plunger and said tube for urging said plunger outwardly, and a piston slidably mounted on said tube.

4. Means for filling a lubricating device comprising a receptacle, a cylinder in free communication with said receptacle, a hollow plunger having its inner end reciprocable in said cylinder and its outer end projecting out of said receptacle, an outwardly opening check valve in said plunger, a tube surrounding said plunger in spaced relation thereto, and a compression spring between said plunger and said tube for urging said plunger outwardly, and a piston slidably mounted on said tube.

5. A lubricant dispensing apparatus com- I prising a receptacle having a raised bottom for holding a supply of lubricant, a cylinder extending through said bottom and supported thereby, said cylinder communicating with said receptacle, strut-rods for connecting the bottom of said cylinder with the walls of said receptacle, a hollow plunger reciprocable in said cylinder, and a piston in said receptacle slidable relatively to said plunger.

6. A lubricant dispensing apparatus comprising a receptacle for holding a supply of lubricant, said receptacle having a bottom, a cylinder extending through said bottom, and supported thereby, said cylinder communicating with said receptacle, strut-rods for connecting the bottom of said cylinder with the walls of said receptacle, and a hollow plunger reciprocable in said cylinder.

In witness whereof, I hereunto subscribe ERNEST W. DAVIS. 

